You will get Ruby on Rails Developer React Node FinTech SaaS | MVP or Feature
Project details
I've spent 8+ years building Ruby on Rails backends for FinTech and SaaS companies across the US, UK, and Europe - from payment platforms and investment tracking apps to debt collection CRMs with AML/KYC compliance.
What sets this apart: I don't just write code - I design systems that handle real financial data at scale, integrate with payment APIs (Stripe, banking APIs), and stay maintainable long-term. Every project starts with a clear scope session so we align on priorities before a single line of code is written.
What you get:
✔ Architecture designed for financial data security
✔ Payment integration (Stripe, custom payment APIs)
✔ PostgreSQL schema optimized for financial logic
✔ Clean, documented code with RSpec test coverage
✔ Investment and portfolio tracking backend systems
✔ AML/KYC compliance layer when required
✔ Deployment-ready on AWS or DigitalOcean with Docker
✔ Lifetime warranty on all delivered code
Best for: FinTech MVPs, feature additions to existing Ruby on Rails apps, payment flow development, financial dashboard backends.
Message me before purchasing so I can confirm the fit and kick off within 24 hours.
What sets this apart: I don't just write code - I design systems that handle real financial data at scale, integrate with payment APIs (Stripe, banking APIs), and stay maintainable long-term. Every project starts with a clear scope session so we align on priorities before a single line of code is written.
What you get:
✔ Architecture designed for financial data security
✔ Payment integration (Stripe, custom payment APIs)
✔ PostgreSQL schema optimized for financial logic
✔ Clean, documented code with RSpec test coverage
✔ Investment and portfolio tracking backend systems
✔ AML/KYC compliance layer when required
✔ Deployment-ready on AWS or DigitalOcean with Docker
✔ Lifetime warranty on all delivered code
Best for: FinTech MVPs, feature additions to existing Ruby on Rails apps, payment flow development, financial dashboard backends.
Message me before purchasing so I can confirm the fit and kick off within 24 hours.
Programming Languages
JavaScript, Ruby/Ruby on RailsCoding Expertise
Performance Optimization, SecurityWhat's included $15,000
These options are included with the project scope.
$15,000
- Delivery Time 30 days
- Number of Revisions 1
- Responsive Design
- Source Code
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DD
Daniel D.
Feb 17, 2025
Ruby & Rails project audit and roadmapping
Was good working together
BC
Ben C.
Nov 9, 2024
Strip old theme/css/js from jumpstartrails and integrate a different theme (both are rails based)
Prompt and, excellent work with a knowledgeable team. Will definitely work with again!
DW
Dan W.
Jul 28, 2020
Ruby developers needed: Provide feedback on a new tool for Ruby developers
Great job! Thank you!
MZ
Michael Z.
Apr 16, 2018
Experienced Vue.JS, Canvas fit, Symfony2 Developer for large ongoing project (you got to be located in Europe)
All good, thanks mate
MW
Mathias W.
Oct 19, 2016
Ember one-page-app developer
Really good quality code and very focused on delivering quickly. Great to work with a kind person who seeks to truly understand the problem before solving it.
I will for sure get Slobodzyan for my next Javascript project.
I will for sure get Slobodzyan for my next Javascript project.
About Roman
Ruby on Rails Developer React Node.js Full-stack Web Development
100%
Job Success
Khmelnitsky, Ukraine - 1:54 am local time
Clients come to me when the product has real complexity - payment flows, multi-role systems, third-party integrations, data-heavy architectures that hold up for years.
✅ 𝗖𝗹𝗶𝗰𝗸 𝗛𝗶𝗿𝗲 𝗼𝗿 𝗜𝗻𝘃𝗶𝘁𝗲 to work with a Node.js Full-Stack Developer who owns the architecture, not just the tickets.
🎯 𝗪𝗛𝗔𝗧 𝗬𝗢𝗨 𝗚𝗘𝗧
✔️ As a Node.js Full-Stack Developer - full ownership from architecture to deployment. React, Node.js, TypeScript, PostgreSQL, Redis, REST API, Docker, AWS. Clean, documented code.
✔️ As a Full-Stack Web Development React Node specialist - end-to-end SaaS platforms, payment integrations (Stripe, Xero), multi-role admin panels, Elasticsearch reporting. 40-60% faster delivery than split-role teams.
✔️ As a Ruby on Rails Developer - Rails 4-7.1 codebases, monolith upgrades, RSpec-covered backends, Sidekiq async. 8+ years, 15+ production systems shipped.
✔️ As a Node.js Full-Stack and Ruby on Rails Developer React engineer - Next.js, React, TypeScript paired with Node.js or Rails. Full-Stack Web Development React Node delivery across FinTech, EdTech, B2B SaaS.
🔥 𝗦𝗢𝗠𝗘 𝗣𝗥𝗢𝗝𝗘𝗖𝗧𝗦
✔️ Greek Capital (USA) - accounting + CRM SaaS, Elasticsearch reporting, automated workflows. Ruby on Rails Developer · Full-Stack Web Development React Node. Ongoing since 2017 ($100-250k).
✔️ Roi (Norway) - finance PWA: Stripe, asset tracking, investment calculator. React Node.js Full-Stack · Ruby on Rails Developer React · TypeScript.
✔️ MilkMind (France) - high-load EdTech marketplace, AI integration, video, Stripe. Node.js Full-Stack Developer · Ruby on Rails Developer React · Next.js.
✔️ Sket (Belgium) - LegalTech SaaS: contract automation, blockchain. Ruby on Rails Developer · React Node.js Full-Stack · RSpec.
✔️ H&P Builder (USA) - EHR product, multi-level admin. Full-Stack Web Development React Node · Node.js Full-Stack Developer.
🚀 𝗪𝗛𝗘𝗥𝗘 𝗜 𝗗𝗘𝗟𝗜𝗩𝗘𝗥
✔️ FinTech SaaS - as a Node.js Full-Stack Developer and Ruby on Rails Developer: payment integrations, credit management, accounting platforms. US, UK, Nordics. 8+ years, zero payment flow failures.
✔️ EdTech & marketplaces - Full-Stack Web Development React Node and React Node.js Full-Stack: high-load architecture, AI integration, video delivery, subscription logic. 30-50% better scalability.
✔️ LegalTech & compliance - Ruby on Rails Developer React and React Node.js Full-Stack: blockchain, document automation, audit-trail data flows for EU-market compliance SaaS.
✔️ HealthTech & EHR - Node.js Full-Stack Developer and Full-Stack Web Development React Node: secure document generation, recommendation logic, HIPAA-aware.
✔️ B2B SaaS - Ruby on Rails Developer, Node.js Full-Stack Developer, Full-Stack Web Development React Node: permission layers, file management, long-term codebase ownership.
🏆 𝗜𝗡𝗗𝗨𝗦𝗧𝗥𝗬 𝗩𝗘𝗥𝗧𝗜𝗖𝗔𝗟𝗦
✔️ FinTech - Node.js Full-Stack Developer and Ruby on Rails Developer: Stripe, Xero, credit SaaS. Zero payment errors across 8 years.
✔️ EdTech - Full-Stack Web Development React Node and React Node.js Full-Stack: AI-powered, high-load marketplace platforms.
✔️ LegalTech - Ruby on Rails Developer and Ruby on Rails Developer React: smart contracts, document automation, blockchain.
✔️ HealthTech - React Node.js Full-Stack and Full-Stack Web Development React Node: EHR, secure data, recommendation logic.
✔️ B2B SaaS - Node.js Full-Stack Developer: Ruby on Rails Developer React architecture, full ownership.
⚒️ 𝗛𝗢𝗪 𝗜 𝗕𝗨𝗜𝗟𝗗
✔️ Core - Node.js Full-Stack Developer and Ruby on Rails Developer: Node.js, ExpressJS, Ruby on Rails (4-7.1), JavaScript, TypeScript, React, Next.js, Vue.js, PostgreSQL, Redis, Docker, AWS, REST API, RSpec.
✔️ Frontend - Full-Stack Web Development React Node: React, TypeScript, HTML, HTML5, CSS, CSS 3, Bootstrap, Tailwind CSS, jQuery, Web Design, Mobile App Development.
✔️ Backend - React Node.js Full-Stack builds: ExpressJS, MongoDB, MySQL, SQL, PHP, Laravel, CodeIgniter, Python, API Integration, API, Database Architecture, Software Architecture & Design, Agile Software Development.
✔️ Ecosystem: React Native, Angular, AngularJS, WordPress, WooCommerce, Shopify, iOS Development, Android App Development, Git, Software Development, Software Debugging, Product Development, Search Engine Optimization.
✔️ Creative & extended: Graphic Design, Adobe Photoshop, Adobe Illustrator, Web Application, Software Design, Desktop Application, Data Entry, Ruby, RSpec, PostgreSQL.
🔹 Node.js Full-Stack Developer · Full-Stack Web Development React Node · React Node.js Full-Stack · Ruby on Rails Developer - lifetime warranty on every line of code.
🔹 Ruby on Rails Developer React · UTC+2 · async-friendly
Building a product? 👉 Message and let me support your way on a risk-free way..
Steps for completing your project
After purchasing the project, send requirements so Roman can start the project.
Delivery time starts when Roman receives requirements from you.
Roman works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Scoping
We align on your product goals, technical requirements, and scope. I review your existing codebase if applicable and define the architecture approach for your FinTech solution.
Development & Delivery
Rails backend development with regular progress updates. Clean, documented code with RSpec test coverage. PostgreSQL schema optimized for financial data.